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Series System Operation
445-0089-01-01 7–11
Series System Operation
Invert Mode
The two PROsines will operate strictly as a pair in Invert mode. Before each cycle
of AC output, the two units confer over the sync cable to verify that the other unit
has no errors and is ready to put out the next cycle. A number of conditions must
be met for the pair of PROsines to invert:
• Invert mode must be enabled on both displays.
• No errors can be present in either unit.
• The sync cable must be good.
• One (or both) sides of the AC input (shorepower) must be outside the transfer
limits you have configured (e.g., low voltage).
If shorepower becomes valid on both phases when the PROsine is inverting, both
units will synchronize to it and, as a pair, transfer to shorepower. Any transfers or
shutdowns, etc. will occur on both phases within one cycle of each other.
Charge Mode
Both phases of the shorepower must be “good” before either unit will transfer to
shorepower and be able to charge. Therefore neither unit will charge unless both
phases of shorepower are good. However it is not necessary that both units have
Charge mode enabled for one to operate.
Important:
If both PROsines are connected to one battery bank and are configured as
primary/secondary, the charge operation is somewhat different than normal:
• The primary charger performs the entire charge cycle.
• The secondary charger completes the Bulk stage only, allowing the primary charger to
accurately finish the charging cycle.